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Finding the Fourth Proportional to 15,644.19, 21,588.99 and 8,570.64

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Solution

The fourth proportional to 15,644.19, 21,588.99 and 8,570.64 is: 11,827.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,644.19 : 21,588.99 = 8,570.64 : x
  2. Step 2: Convert to fraction form
    15,644.19/21,588.99 = 8,570.64/x
  3. Step 3: Cross multiply
    15,644.19x = 21,588.99 × 8,570.64
  4. Step 4: Simplify right side
    15,644.19x = 185,031,461.25
  5. Step 5: Solve for x
    x = 185,031,461.25/15,644.19
  6. Step 6: Final answer
    x = 11,827.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.